Institutional investor participation in the single family residential market fell another notch in the third quarter of 2014. RealtyTrac said today that only 4.3 percent of residential sales in the most recently completed quarter went to those investors, defined as those who purchase 10 or more properties in a calendar year. This group was responsible for purchases of 5.0 percent of single family homes and condos in the second quarter and 5.3 percent in the third quarter of 2013. The recent results were the smallest since the fourth quarter of 2010.